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Question
The total surface area of hemisphere is 300 πcm2, then find its radius.
Options
8 cm
12 cm
10 cm
9 cm
MCQ
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Solution
10 cm
Explanation:
Total surface area of a hemisphere = 3πr2.
So, 3πr2 = 300π
⇒ 3r2 = 300
⇒ r2 = 100
⇒ r = 10 cm (positive radius).
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